Jepson Flora Project: Jepson Interchange    

 
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Jepson Interchange (more information)
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MALVACEAE

MALLOW FAMILY

Steven R. Hill, except as specified

Annual, perennial herb, shrubs, trees, generally stellate-hairy; juice sticky; inner bark tough, fibrous
Leaves alternate, simple, petioled; blade generally palmately veined or lobed, stipules present
Inflorescence often leafy; whorl or involucre of bractlets often subtending calyx
Flower generally bisexual, radial; calyx lobes 5, margins abutting in bud; petals 5, free (fused at base to filament tube, so falling together); stamens many, filaments fused into a tube surrounding style, tube fused in turn to petal bases; pistil 1, ovary superior, chambers generally 5 or more, style branches, stigmas generally 1 or 2 X as many as chambers
Fruit of 5–many disk- or wedge-shaped segments, loculicidal capsule, or berry
Genera in family: 100 genera, 2000 species: worldwide, especially warm regions; some cultivated (e.g., Abelmoschus , okra; Alcea ; Gossypium , cotton; Hibiscus , Malvaviscus )
Recent taxonomic note: Recently treated to include Sterculiaceae [Angiosperm phylogeny Group 1998 Ann Missouri Bot Gard 85:531–553; Alverson et al. 1999 Amer J Bot 86:1474–1486; Bayer et al. 1999 Bot J Linn Soc 129:267–303]
Mature fruit important for identification.

HIBISCUS

ROSE-MALLOW, HIBISCUS

Annual, perennial herb, shrubs, trees
Inflorescence: flowers generally solitary in axils; bractlets subtending calyx 3–many, slender, persistent, forming an involucre
Flower generally showy; filament tube 5-toothed, anthers scattered on upper 1/2 below tip
Fruit: capsule; chambers 5
Seeds 2–many per chamber
Species in genus: 200 species: warm regions
Etymology: (Greek: name used by Dioscorides for marshmallow)
Reference: [Fryxell 1980 Techn Bull USDA 1624:1–53]

Native

H. denudatus Benth.

PALE FACE

Subshrub, tomentose
Stem 3–6 dm, slender
Leaf: blade 1–3 cm, ovate, finely toothed
Flower: peduncle < 1 cm; sepals fused only at base; petals 1–2.5 cm, white to lavender, base generally purple
Fruit < calyx
Seed reniform, densely silky
Ecology: Desert scrub of mesas, canyons
Elevation: < 800 m.
Bioregional distribution: Sonoran Desert
Distribution outside California: to w Texas, n Mexico
Flowering time: Feb–May

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